Just a small update: I downloaded clutter 1.2.6 (which by the way is not linked as current version on the clutter-project.org page as current verson) and took a dive into the sources. I'm assuming that I'm implicitly using the X11 clutter-backend and therefore the clutter_stage_x11_set_fullscreen function. Reading the comments on the code, it seems to be the window manager, which is responsible for the handling of the fullscreen operation. Am I still on the right track ?
I'm using compiz (1:0.8.4-0ubuntu15). Something, that I neglected before: I asked the stage what size it is and it responds with 1680x1050, which is the size of one monitor. So the fullscreen operation on compiz does only support one monitor in my version/configuration. I'll try to find some more information on that and report back later. Meanwhile any pointers for more information on that topic are welcome. Thanks, Martin
